(Deoxycholic acid)2:Ferrocene:  A Phase Transition Determined by the Dynamic Behavior of the Included Guest Molecules

2000 ◽  
Vol 12 (5) ◽  
pp. 1314-1322 ◽  
Author(s):  
Matthias Müller ◽  
Alison J. Edwards ◽  
Keith Prout ◽  
W. Mark Simpson ◽  
Stephen J. Heyes
Keyword(s):  
Phase Transition ◽  
Dynamic Behavior ◽  
Deoxycholic Acid ◽  
Guest Molecules

Definition and Application of a Five-Parameter Characterization of One-Dimensional Cellular Automata Rule Space

2001 ◽  
Vol 7 (3) ◽  
pp. 277-301 ◽  
Author(s):  
Gina M. B. Oliveira ◽  
Pedro P. B. de Oliveira ◽  
Nizam Omar
Keyword(s):  
Phase Transition ◽  
Dynamical Systems ◽  
Cellular Automata ◽  
Dynamic Behavior ◽  
Discrete Dynamical Systems ◽  
Transition Diagram ◽  
One Dimensional ◽  
Rule Space ◽  
Spatially Extended

Cellular automata (CA) are important as prototypical, spatially extended, discrete dynamical systems. Because the problem of forecasting dynamic behavior of CA is undecidable, various parameter-based approximations have been developed to address the problem. Out of the analysis of the most important parameters available to this end we proposed some guidelines that should be followed when defining a parameter of that kind. Based upon the guidelines, new parameters were proposed and a set of five parameters was selected; two of them were drawn from the literature and three are new ones, defined here. This article presents all of them and makes their qualities evident. Then, two results are described, related to the use of the parameter set in the Elementary Rule Space: a phase transition diagram, and some general heuristics for forecasting the dynamics of one-dimensional CA. Finally, as an example of the application of the selected parameters in high cardinality spaces, results are presented from experiments involving the evolution of radius-3 CA in the Density Classification Task, and radius-2 CA in the Synchronization Task.

scholarly journals Elimination Processes of Guest Molecules from the Inclusion Compounds of Deoxycholic Acid.

2003 ◽  
Vol 51 (1) ◽  
pp. 242-246 ◽  
Author(s):  
Takayoshi KIMURA ◽  
Yuichi KASAI ◽  
Tomohide TSUJIMOTO ◽  
Emi KAWAMURA ◽  
Tadashi KAMIYAMA ◽  
...  
Keyword(s):  
Inclusion Compounds ◽  
Deoxycholic Acid ◽  
Guest Molecules

Dynamic Behavior of Diatomic Guest Molecules in Clathrate Hydrate Structure II

1997 ◽  
Vol 101 (32) ◽  
pp. 6290-6292 ◽  
Author(s):  
Shinichiro Horikawa ◽  
Hidenosuke Itoh ◽  
Jiro Tabata ◽  
Katsuyuki Kawamura ◽  
Takeo Hondoh
Keyword(s):  
Dynamic Behavior ◽  
Clathrate Hydrate ◽  
Guest Molecules

Static and dynamic properties of hydrogen sulphide in hydroquinone clathrates

1988 ◽  
Vol 66 (4) ◽  
pp. 943-954 ◽  
Author(s):  
Harutoshi Ukegawa ◽  
Takasuke Matsuo ◽  
Hiroshi Suga ◽  
Alan J. Leadbetter ◽  
Richard C. Ward ◽  
...  
Keyword(s):  
Phase Transition ◽  
Hydrogen Sulphide ◽  
Direct Evidence ◽  
Dynamic Properties ◽  
Dielectric Constants ◽  
Trigonal Axis ◽  
Discrete Energy ◽  
Guest Molecules ◽  
Elastic Neutron ◽  
Axis Parallel

A variety of investigations has been undertaken on hydrogen sulphide hydroquinone clathrates, with the aim of achieving a better understanding of the motions of the guest molecules and of the phase transition near 8 K, Measurements have been made, over a wide temperature range including the phase transition, of heat capacities on H2S, D2S, and HDS clathrates, dielectric constants perpendicular and parallel to the trigonal axis of single crystal specimens, incoherent quasi-elastic neutron scattering, and neutron diffraction. All of the data are consistent with the H2S molecular dipole being able to rotate rather easily about an axis parallel to the trigonal crystal c axis. Rotations about the other axes are much more difficult. The rotation about the trigonal axis is almost free at high temperatures but there is evidence for three preferred orientations at temperatures just above the phase transition. No discrete energy states are observed at any temperature due to strong guest–cage and guest–guest interactions. The experiments provide direct evidence that the phase transition is associated with a cooperative freezing out of the dipole reorientations.

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